Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...258..193h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 258, no. 1, p. 193-200.
Astronomy and Astrophysics
Astronomy
10
Astronomical Catalogs, Position (Location), Recognition, Sky Surveys (Astronomy), Spaceborne Astronomy, Hipparcos Satellite, Signal Analysis, Stellar Magnitude, Transits
Scientific paper
The observations of the first year of mission of the Tycho program will be used for revising the Tycho Input Catalogue (TIC). The Tycho Input Catalogue Revision essentially defines the list of objects in the final Tycho output catalogs. This paper describes the mathematical and practical details of this revision process. The stars will be recognized with three different processes, according to their distances from the positions in the TIC. The main process concerns the stars closer than 6 arcsec to the T/C positions; stars with separations between 6 and 20 arcsec are recognized too, but the threshold in detection is slightly brighter than in the main process. Stars absent from the input catalog could also be recognized, but with an even higher threshold in detection. An assessment based on about 85 hours of actual Hipparcos observations is presented. It points to a Tycho Input Catalogue Revision containing about 1 million stars.
Bastian Ulrich
Halbwachs Jean-Louis
Hog Erik
Schwekendiek P.
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